The little 3.4-by-1.6-inch remote has just three buttons: volume up, volume down, and mute. It ramps the volume up and down a little too quickly for us, but we eventually got the hang of it. The previous Zvox model, the 315, didn't come with a remote, so it's nice to be able to make adjustments from the couch--especially the emergency mute. Other controls on the unit itself include a master power switch and a woofer volume control for the internal woofer. The large wall-wart power supply looks like it means business.
After we set it up in our listening room, the Zvox 325 spread the sound of the phantom left and right "speakers" two to three feet to the sides when we were watching DVDs. The believability of the illusion was superior to those of most single-speaker virtual surround systems we've tested. Surround effects weren't evident from the rear of the room but were projected toward us. All in all, that's impressive performance from a single speaker. Dialogue was natural sounding, without the hollow processing effects we sometimes experience with other virtual surround speakers. The PhaseCue knob on the front panel is adjustable and controls the surround effect--turned all the way down, you just hear the sound of the Zvox 325's three speakers without any processing, but as you turn the PhaseCue up, the apparent soundstage width increases.
Listening to Pat Metheny's brand-new The Way Up-Live DVD in the dark, you'd be hard-pressed to guess all that sound was coming from one speaker. Metheny's unique fusion of acoustic and electric jazz had ample dynamic impact; his nimble guitar textures were vivid, and Steve Rodby's bass was tautly defined. The music is best enjoyed at a healthy volume, and we discovered the Zvox 325 can definitely play loud enough to fill a moderately sized room. As with almost every virtual surround speaker we've tested, the surround is at its best only for listeners seated directly in line with the speaker. Move over to the right or left, and the soundstage collapses into the speaker.
Next we hammered the Zvox 325 with The Fast and the Furious: Tokyo Drift DVD, and marveled at the stamina of the speaker. The whine of high-rpm "rice rocket" cars weren't as audibly powerful as we would experience from a separates-based system, but the Zvox 325 never distorted or broke the spell of the film. And the bass? As far as single-speaker systems go, it's bigger and all around more powerful than any of the other systems we've heard, including the far more expensive Yamaha YSP-series speakers. That said, the Zvox 325 won't fool you into thinking there's a subwoofer lurking in the corner of your room.